Improvement in knobs for safe-doors



lnited gitana anni (nimm.

Letters Patent No. 102,132, dated Apr/l 19, 1870.

IMPROVEMENT IN KNOBS FO-R SAFE-DOORS.

Th Schedule referred to in these Lettere Patent and making part 'of the name.

To all whom it may concern:

Be it known that I, J osnPH G. KlTTnaDGE, of the cityof San Francisco, in the State of California, have invented a certain new and useful Improvement on the Arbor or Spindle of Locks and Detachable Knob for Doors; and I do hereby declare that the following is a full, clear and exact description ofthe same, reference being had to the drawing accompanying and form-V ing part of this specification, and to the letters and marks thereon, which drawing represeuts'my invention applied to the spindle of a lock- Figure 1 being a View, by section, of the parts composing the invention. l

Figure 2, a view of that pall; of the door to which the knob is attached;

Figure 3, a View of the knob detached; and

Figure 4, a face view of the outer end of the cylinders to which the knob is connected when in use.

In each of these AFigures like marks and let-ters are used to indicate like parts.

My invention has reference to that class of locks ,known as combination locks, more colnn'ionly applied 'i ange, y, which, in any suitable way, can be connected to the tumble-rs ofl the lock. The outer ends of the cylinders may be ush with the surface or face of the door h., or may be within.

A screw, li, will serve to aix the knob to the hea j of the spindle, which may be within, or which may be flush with the door, as shown in fig. 1, and in line cylinders, and to the spindle or arbor of the lock, the

bolt can be moved as usual when the knob 0r wrench is a permanent part of the lock; and that, when the knob is detached, the spindle or arbor cannot be moved or the lock snccessfullytampered with.

What Iclaim as my invention, and `desire to secure hy Letters Patent, is l The detachable knob constructed of pieces a bc surrounding a central screw, 1', to attach the knob to the spindle of the lock, and the flanges of the pieces haring pins d d d to fit into holes ee e in the flanges of the cylinders, and operated substantially as herein recited.

This specification signed this 28th day of September,

JOSEPH G. KITTREDGE.

Witnesses:

C. W. KITTREDGE, GEOJS. KITTREDGE. 

